大约有 16,400 项符合查询结果(耗时:0.0233秒) [XML]

https://stackoverflow.com/ques... 

Are Stored Procedures more efficient, in general, than inline statements on modern RDBMS's? [duplica

Conventional wisdom states that stored procedures are always faster. So, since they're always faster, use them ALL THE TIME . ...
https://stackoverflow.com/ques... 

How to use concerns in Rails 4

...oject generator now creates the directory "concerns" under controllers and models. I have found some explanations about how to use routing concerns, but nothing about controllers or models. ...
https://stackoverflow.com/ques... 

What algorithm can be used for packing rectangles of different sizes into the smallest rectangle pos

Ive got a bunch of rectangular objects which I need to pack into the smallest space possible (the dimensions of this space should be powers of two). ...
https://stackoverflow.com/ques... 

Quickly reading very large tables as dataframes

I have very large tables (30 million rows) that I would like to load as a dataframes in R. read.table() has a lot of convenient features, but it seems like there is a lot of logic in the implementation that would slow things down. In my case, I am assuming I know the types of the columns ahead o...
https://stackoverflow.com/ques... 

How to generate keyboard events in Python?

short summary: 9 Answers 9 ...
https://stackoverflow.com/ques... 

Capture Image from Camera and Display in Activity

I want to write a module where on a click of a button the camera opens and I can click and capture an image. If I don't like the image I can delete it and click one more image and then select the image and it should return back and display that image in the activity. ...
https://stackoverflow.com/ques... 

RegEx match open tags except XHTML self-contained tags

I need to match all of these opening tags: 35 Answers 35 ...
https://stackoverflow.com/ques... 

How do I control how Emacs makes backup files?

Emacs puts backup files named foo~ everywhere and I don't like having to remember to delete them. Also, if I edit a file that has a hard link somewhere else in the file system, the hard link points to the backup when I'm done editing, and that's confusing and awful. How can I either eliminate th...
https://stackoverflow.com/ques... 

How can I specify a branch/tag when adding a Git submodule?

How does git submodule add -b work? 12 Answers 12 ...
https://stackoverflow.com/ques... 

In a storyboard, how do I make a custom cell for use with multiple controllers?

I'm trying to use storyboards in an app I'm working on. In the app there are Lists and Users and each contains a collection of the other (members of a list, lists owned by a user). So, accordingly, I have ListCell and UserCell classes. The goal is to have those be re-usable throughout the ap...